So the researchers can better evaluate the real overall effect of the drug being studied
Answer:
The Exosphere
Explanation:
The Exosphere is the farthest away from the Earth and the least dense. Going towards the Earth a space ship would pass through the Ionosphere, then the Stratosphere where high flying airplanes can be found, and finally closest to the Earth is the Troposphere which is the thickest layer where all our weather takes place.
it's autotrophs.
They are the primary producers.
Answer:
<em>When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective. Re-focus on the image and then switch to the next highest power.</em>
External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.
